# SDR ASAA12511421

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2012
- Submitted: April 19, 2012
- Operation: Air carrier
- Aircraft: [N519AS](https://openairdocs.org/aircraft/N519AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36482
- Aircraft time: 12,048 hours, 3,658 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Condition: Inoperative
- Location: Nr1 Engine
- Part time: 12,048 hours, 3,653 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA12511421

## Discrepancy

AFTER ENGINE START ON PUSH BACK.  NR 1 ENGINE GEN WOULD NOT COME ON LINE. VOLTS/FREQS CHECK GOOD.  ACFT GROUNDED.  PERFORMED FIM TASK 24-21-00-810-807 GCB/APB FAULT.  R & R NR 1 ENGINE GENERATOR CONTROL UNIT REF MM 24-21-81-400-801. OPS CHECKED GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.